Vaccine and Vaccination

A vaccine is a biological preparation that provides a specific disease with active acquired immunity. A vaccine typically contains an agent that resembles a microorganism that causes disease and is often produced from weakened or killed forms of the microbe, its toxins, or one of its surface proteins. The agent activates the body's immune system to identify the agent as a threat, kill it, and further recognize and destroy any of the microorganisms that may be associated with that agent in the future. Vaccines may be prophylactic (to prevent or reduce possible infection by a natural or "wild" pathogen) or preventive (e.g. cancer vaccines being investigated). Administration of vaccines is called Vaccination. There are various types of vaccines. For example,

  • Inactivated Vaccine
  • Attenuated Vaccine

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